 He has taught at Oberlin College since 1974 and holds the endowed Mildred C. Jay professorship in art history.He is a fellow at the American Academy in Rome, as well as the Harvard University Center for Italian Renaissance Studies at the Villa I Tatti in Florence, where he held two visiting professorships from 1989–90 and from 1999-2000.He is also a 2005 recipient of an Andrew W. Mellon fellowship at the Metropolitan Museum of Art in New York City.